The Cyberstorm Mk-I is of a modular design and comes in three main
parts (4 if you include SCSI II). The main part called the carrier
board actually connects into the processor slot on the motherboard. The
next component is referred to as the processor daughterboard. This is a
small card which contains either an 040@25Mhz, 040@40Mhz or an
060@50Mhz, and usually contains a heat sink and/or fan. The processor
daughterboard connects on top of the carrier board in parallel. The
third component is the memory daughterboard. This contains 4 x 72pin
SIMM slots for adding up to a maximum of 128MB and supports SIMM sizes
of 4MB to 32MB in mixed configurations. The memory daughterboard is
fitted to the carrier board on top but at right angles. If no memory is
intended to be added to the memory daughterboard then it does not have
to be fitted. It may not be possible to physically fit this card in a
standard A3000 desktop and it may also be necessary to perform an INT-2
modifcation, but this has not been confirmed. If you have the SCSI-II
module attached, it may conflict with the internal SCSI controller in
an A3000 series machine.

Jumper Settings

For an
040@25Mhz, the jumper marked INT on the A4000 motherboard needs to be
set for the Internal Clock Signal. For an 040@40Mhz and 060@50Mhz the
jumper needs to be set to EXT for an external Clock Signal.

Main Jumpers

Jumper Name

Position

Function

IPEND

ON

No mainboard CPU

CBR

ON

CPU on mainboard

DIAG

Pos 1-2

Enable Diagnostic ROM

Pos 2-3

Disable Diagnostic ROM

ROM Size

Pos 1-2

16bit ROMs

Pos 2-3

8bit ROMs

ROM Count

Pos 1-2

Two ROMs Installed

Pos 2-3

One ROM Installed

JPA

Pos 1-2

Normal RAM Access

Pos 2-3

Fast RAM Access

OPEN

Slow RAM Access

MB Burst

Pos 1-2

Enable MainBoard burst access

Pos 2-3

Disable MainBoard burst access

RAM Jumpers

Total RAM

Bank 0

Bank 1

Bank 2

Bank 3

Jumper Reference See Diagram Below

4/8/12/16MB

4/0MB

4/0MB

4/0MB

4/0MB

A

8/12/16/20MB

8MB

4/0MB

4/0MB

4/0MB

B

16/20/24/28MB

16MB

4/0MB

4/0MB

4/0MB

C

32/36/40/44MB

32MB

4/0MB

4/0MB

4/0MB

D

16/20/24MB

8MB

8MB

4/0MB

4/0MB

E

24/28/32MB

16MB

8MB

4/0MB

4/0MB

F

40/44/48MB

32MB

8MB

4/0MB

4/0MB

G

32/36/40MB

16MB

16MB

4/0MB

4/0MB

H

48/52/56MB

32MB

16MB

4/0

4/0

I

64/68/72MB

32MB

32MB

4/0MB

4/0MB

J

24/28MB

8MB

8MB

8MB

4/0MB

K

32/36MB

16MB

8MB

8MB

4/0MB

L

48/52MB

32MB

8MB

8MB

4/0MB

M

40/44MB

16MB

8MB

8MB

4/0MB

N

56/60MB

32MB

16MB

8MB

4/0MB

O

72/76MB

32MB

32MB

8MB

4/0MB

P

48/52MB

16MB

16MB

16MB

4/0MB

Q

64/68MB

32MB

16MB

16MB

4/0MB

R

80/84MB

32MB

32MB

16MB

4/0MB

S

96/100MB

32MB

32MB

32MB

4/0

T

32MB

8MB

8MB

8MB

8MB

U

40MB

16MB

8MB

8MB

8MB

V

56MB

32MB

8MB

8MB

8MB

W

48MB

16MB

16MB

8MB

8MB

X

64MB

32MB

16MB

8MB

8MB

Y

80MB

32MB

32MB

8MB

8MB

Z

56MB

16MB

16MB

16MB

8MB

1

72MB

32MB

16MB

16MB

8MB

2

88MB

32MB

32MB

16MB

8MB

3

104MB

32MB

32MB

32MB

8MB

4

64MB

16MB

16MB

16MB

16MB

5

80MB

32MB

16MB

16MB

16MB

6

96MB

32MB

32MB

16MB

16MB

7

112MB

32MB

32MB

32MB

16MB

8

128MB

32MB

32MB

32MB

32MB

9

Bank 0 is closest to the connector. The largest SIMM must always be
placed in bank 0, with the second largest in bank 1 and so on.